Work, Energy, and Heat Concepts

Work, Energy, and Heat Concepts

Assessment

Interactive Video

Physics, Chemistry, Science

10th - 12th Grade

Hard

Created by

Mia Campbell

FREE Resource

This video tutorial covers various practice problems related to thermal chemistry. It begins with an introduction to thermal chemistry concepts, followed by a detailed explanation of gas expansion and the work done by the system. The video then demonstrates how to calculate changes in internal energy, heat absorption in water, and heat release during phase changes. It also explores the enthalpy of combustion for propane and methane, providing step-by-step calculations and explanations.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the sign of work done by a gas when it expands?

Zero

Negative

Undefined

Positive

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which formula is used to calculate the work done by a gas at constant pressure?

W = -p / ΔV

W = -p * ΔV

W = p / V

W = p * V

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the context of internal energy, what does a positive 'q' indicate?

Heat is released by the system

Work is done on the system

No heat exchange

Heat is absorbed by the system

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the change in internal energy (ΔE) calculated in chemistry?

ΔE = q - W

ΔE = W - q

ΔE = q + W

ΔE = q * W

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the specific heat capacity of water?

2.184 J/g°C

8.184 J/g°C

4.184 J/g°C

6.184 J/g°C

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which substance is better at storing thermal energy?

Substance with low specific heat capacity

Substance with no specific heat capacity

Substance with variable specific heat capacity

Substance with high specific heat capacity

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to energy when water freezes?

Energy is doubled

Energy is absorbed

Energy is released

No energy change

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